Advanced Docking System With Magnetic Initial Capture

An advanced docking system is undergoing development to enable softer, safer docking than was possible when using prior docking systems. This system is intended for original use in docking of visiting spacecraft and berthing the Crew Return Vehicle at the International Space Station (ISS). The system could also be adapted to a variety of other uses in outer space and on Earth, including mating submersible vehicles, assembling structures, and robotic berthing/handling of payloads and cargo. Heretofore, two large spacecraft have been docked by causing the spacecraft to approach each other at a speed sufficient to activate capture latches - a procedure that results in large docking loads and is made more difficult because of the speed. The basic design and mode of operation of the present advanced docking system would eliminate the need to rely on speed of approach to activate capture latches, thereby making it possible to reduce approach speed and thus docking loads substantially. The system would comprise an active subsystem on one spacecraft and a passive subsystem on another spacecraft with which the active subsystem will be docked. The passive subsystem would include an extensible ring containing magnetic striker plates and guide petals. The active subsystem would include mating guide petals and electromagnets containing limit switches and would be arranged to mate with the magnetic striker plates and guide petals of the passive assembly. The electromagnets would be carried on (but not rigidly attached to) a structural ring that would be instrumented with load sensors. The outputs of the sensors would be sent, along with position information, as feedback to an electronic control subsystem. The system would also include electromechanical actuators that would extend or retract the ring upon command by the control subsystem

Low-Impact Mating System for Docking Spacecraft

A document describes a low-impact mating system suitable for both docking (mating of two free-flying spacecraft) and berthing (in which a robot arm in one spacecraft positions an object for mating with either spacecraft). The low-impact mating system is fully androgynous: it mates with a copy of itself, i.e., all spacecraft and other objects to be mated are to be equipped with identical copies of the system. This aspect of the design helps to minimize the number of unique parts and to standardize and facilitate mating operations. The system includes a closed-loop feedback control subsystem that actively accommodates misalignments between mating spacecraft, thereby attenuating spacecraft dynamics and mitigating the need for precise advance positioning of the spacecraft. The operational characteristics of the mating system can be easily configured in software, during operation, to enable mating of spacecraft having various masses, center-of-gravity offsets, and closing velocities. The system design provides multi-fault tolerance for critical operations: for example, to ensure unmating at a critical time, a redundant unlatching mechanism and two independent pyrotechnic release subsystems are included

Low-impact mating system

An androgynous mating system for mating two exoatmospheric space modules comprising a first mating assembly capable of mating with a second mating assembly; a second mating assembly structurally identical to said first mating assembly, said first mating assembly comprising; a load ring; a plurality of load cell subassemblies; a plurality of actuators; a base ring; a tunnel; a closed loop control system; one or more electromagnets; and one or more striker plates, wherein said one or more electomagnets on said second mating assembly are capable of mating with said one or more striker plates on said first mating assembly, and wherein said one or more striker plates is comprised of a plate of predetermined shape and a 5-DOF mechanism capable of maintaining predetermined contact requirements during said mating of said one or more electromagnets and said one or more striker plates

Near-Infrared Thermal Emission from TrES-3b: A Ks-band detection and an H-band upper limit on the depth of the secondary eclipse

We present H and Ks-band photometry bracketing the secondary eclipse of the hot Jupiter TrES-3b using the Wide-field Infrared Camera on the Canada-France-Hawaii Telescope. We detect the secondary eclipse of TrES-3b with a depth of 0.133+/-0.017% in Ks-band (8-sigma) - a result in sharp contrast to the eclipse depth reported by de Mooij & Snellen. We do not detect its thermal emission in H-band, but place a 3-sigma limit on the depth of the secondary eclipse in this band of 0.051%. A secondary eclipse of this depth in Ks requires very efficient day-to-nightside redistribution of heat and nearly isotropic reradiation, conclusion that is in agreement with longer wavelength, mid-infrared Spitzer observations. Our 3-sigma upper-limit on the depth of our H-band secondary eclipse also argues for very efficient redistribution of heat and suggests that the atmospheric layer probed by these observations may be well homogenized. However, our H-band upper limit is so constraining that it suggests the possibility of a temperature inversion at depth, or an absorbing molecule, such as methane, that further depresses the emitted flux at this wavelength. The combination of our near-infrared measurements and those obtained with Spitzer suggest that TrES-3b displays a near isothermal dayside atmospheric temperature structure, whose spectrum is well approximated by a blackbody. We emphasize that our strict H-band limit is in stark disagreement with the best-fit atmospheric model that results from longer wavelength observations only, thus highlighting the importance of near-infrared observations at multiple wavelengths in addition to those returned by Spitzer in the mid-infrared to facilitate a comprehensive understanding of the energy budgets of transiting exoplanets.Comment: ApJ accepted, 8 pages, 7 figures, in EmulateApJ forma

Near-infrared Thermal Emission from WASP-12b: detections of the secondary eclipse in Ks, H & J

We present Ks, H & J-band photometry of the very highly irradiated hot Jupiter WASP-12b using the Wide-field Infrared Camera on the Canada-France-Hawaii telescope. Our photometry brackets the secondary eclipse of WASP-12b in the Ks and H-bands, and in J-band starts in mid-eclipse and continues until well after the end of the eclipse. We detect its thermal emission in all three near-infrared bands. Our secondary eclipse depths are 0.309 +/- 0.013% in Ks-band (24-sigma), 0.176 +/- 0.020% in H-band (9-sigma) and 0.131 +/- 0.028% in J-band (4-sigma). All three secondary eclipses are best-fit with a consistent phase that is compatible with a circular orbit. By combining our secondary eclipse times with others published in the literature, as well as the radial velocity and transit timing data for this system, we show that there is no evidence that WASP-12b is precessing at a detectable rate, and show that its orbital eccentricity is likely zero. Our thermal emission measurements also allow us to constrain the characteristics of the planet's atmosphere; our Ks-band eclipse depth argues in favour of inefficient day to nightside redistribution of heat and a low Bond albedo for this very highly irradiated hot Jupiter. The J and H-band brightness temperatures are slightly cooler than the Ks-band brightness temperature, and thus hint at the possibility of a modest temperature inversion deep in the atmosphere of WASP-12b; the high pressure, deep atmospheric layers probed by our J and H-band observations are likely more homogenized than the higher altitude layer. Lastly, our best-fit Ks-band eclipse has a marginally longer duration than would otherwise be expected; this may be tentative evidence for material being tidally stripped from the planet - as was predicted for this system by Li & collaborators, and for which observational confirmation was recently arguably provided by Fossati & collaborators.Comment: AJ accepted. 12 pages, 11 figures, in EmulateApJ format. Version 2 removes two figures that were added by mistak

Implementación de un sistema de gestión de almacén para mejorar la productividad en la empresa Corporación Líder Perú S.A., Surquillo 2021

El presente trabajo de investigación tiene como objetivo determinar como la implementación de un sistema de almacén mejora la productividad de la empresa Corporación Líder Perú S.A. – Surquillo 2021.para la fundamentación teórica del estudio de investigación se siguió Flamarique, (2019) en la variable independiente y Gutiérrez Pulido (2010) en la variable dependiente productividad. La presente investigación es de tipo aplicativo, enfoque cuantitativo, nivel de estudio explicativo y finalmente diseño experimental de tipo preexperimental. Su población son las ordenes de pedidos diarios de un mes con (26 días hábiles) de 1508 órdenes de pedidos con una muestra de 306, se usaron reportes de ingresos de mercaderías, inventarios y reportes de despachos. Analizando la eficiencia y los despachos. Para la implementación de la mejora se utilizó las herramientas de gestión de almacén, con las propuestas de los registros de procedimientos, reubicación layout, la clasificación de almacenamiento ABC, y la actualización de los inventarios con la finalidad de mejorar la rapidez de la brusqueda de los productos. En conclusión se determinó que la gestión de alancen incrementa la productividad en la empresa de Corporación Líder Perú SA. Surquillo 2021 se observa en el mes de pre-test de eficiencia tiene un 80% , y el post-test en eficiencia un incremento a un 93%

Control interno de inventarios y su influencia en la rentabilidad de la Cooperativa Agraria Cafetalera y de Servicios Oro Verde Ltda., distrito de Lamas, 2019

La presente investigación titulada “Control interno de inventarios y su influencia en la rentabilidad de la Cooperativa Agraria Cafetalera y de Servicios Oro Verde Ltda., distrito de Lamas, 2019”. Tuvo como objetivo determinar la influencia del control interno del inventario en la rentabilidad de la Cooperativa Agraria Cafetalera y de Servicios Oro Verde Ltda., distrito de Lamas 2019. El tipo de investigación fue aplicada con diseño no experimental, cuya muestra estuvo conformada por el gerente general y el acervo documentario de la Cooperativa Agraria Cafetalera y de servicios Oro Verde Ltda., de Lamas 2019, asimismo para la recolección de datos se empleó como técnica la entrevista y el análisis documental y como instrumentos la guía de entrevista y la guía de análisis documental. Llegó a concluir que de acuerdo a las deficiencias presentadas y a las pérdidas que se generaron, se determinó que el control interno del inventario influye de manera significativa en la rentabilidad de la Cooperativa Agraria Cafetalera y de Servicios Oro Verde Ltda., distrito de Lamas 2019, asimismo se constató que el control interno del inventario es desarrollado de manera inadecuada por cuanto se evidenció la existencia de deficiencias, tales como el deficiente control y verificación de la calidad y cantidad de mercaderías recepcionadas, la inadecuada ubicación y conservación de las mercaderías existentes en el almacén y el inadecuado control de ingresos y salida de los productos, generando de este modo pérdidas ascendientes a 62,527.30 soles, repercutiendo de manera negativa en la rentabilidad de la cooperativa.The present research entitled "Internal control of inventories and its influence on the profitability of the Cooperativa Agraria Cafetalera y de Servicios Oro Verde Ltda. The objective was to determine the influence of internal inventory control on the profitability of the Cooperativa Agraria Cafetalera y de Servicios Oro Verde Ltda. The research was applied with a non-experimental design, the sample was made up of the general manager and the documentation collection of the Cooperativa Agraria Cafetalera y de Servicios Oro Verde Ltda. of Lamas 2019, also for data collection the interview and document analysis technique were used and the interview guide and document analysis guide were used as instruments. It was concluded that according to the deficiencies reported and the losses generated, it was determined that the internal control of the inventory significantly influences the profitability of the Cooperativa Agraria Cafetalera y de Servicios Oro Verde Ltda. It was also determined that the internal control of the inventory is inadequately developed because of the existence of deficiencies, such as deficient control and verification of the quality and quantity of goods received, inadequate location and conservation of existing goods in the warehouse, and inadequate control of income and output of the products, thus generating losses amounting to 62,527.30 soles, which negatively impacts the profitability of the cooperative.TesisAp

Near-Infrared Thermal Emission from the Hot Jupiter TrES-2b: Ground-Based Detection of the Secondary Eclipse

We present near-infrared Ks-band photometry bracketing the secondary eclipse of the hot Jupiter TrES-2b using the Wide-field Infrared Camera on the Canada-France-Hawaii Telescope. We detect its thermal emission with an eclipse depth of 0.062 +/- 0.012% (5-sigma). Our best-fit secondary eclipse is consistent with a circular orbit (a 3-sigma upper limit on the eccentricity, e, and argument or periastron, omega, of |ecos(omega)| < 0.0090), in agreement with mid-infrared detections of the secondary eclipse of this planet. A secondary eclipse of this depth corresponds to a day-side Ks-band brightness temperature of TB = 1636 +/- 88 K. Our thermal emission measurement when combined with the thermal emission measurements using Spitzer/IRAC from O'Donovan and collaborators suggest that this planet exhibits relatively efficient day to night-side redistribution of heat and a near isothermal dayside atmospheric temperature structure, with a spectrum that is well approximated by a blackbody. It is unclear if the atmosphere of TrES-2b requires a temperature inversion; if it does it is likely due to chemical species other than TiO/VO as the atmosphere of TrES-2b is too cool to allow TiO/VO to remain in gaseous form. Our secondary eclipse has the smallest depth of any detected from the ground at around 2 micron to date.Comment: ApJ accepted, 8 pages, 9 figures, in emulateapj format

Tidal effects on brown dwarfs: Application to the eclipsing binary 2MASSJ05352184-0546085 - The anomalous temperature reversal in the context of tidal heating

2MASSJ05352184-0546085 (2M0535-05) is the only known eclipsing brown dwarf (BD) binary, and so may serve as an important benchmark for models of BD formation and evolution. However, theoretical predictions of the system's properties seem inconsistent with observations: i. The more massive (primary) component is observed to be cooler than the less massive (secondary) one. ii. The secondary is more luminous (by roughly 10^{24} W) than expected. We study the impact of tidal heating to the energy budget of both components. We also compare various plausible tidal models to determine a range of predicted properties. We apply two versions of two different, well-known models for tidal interaction, respectively, (i.) the 'constant-phase-lag' model and (ii.) the 'constant-time-lag' model, and incorporate the predicted tidal heating into a model of BD structure. We find that the contribution of heat from tides in 2M0535-05 alone may only be large enough to account for the discrepancies between observation and theory in an unlikely region of the parameter space. The tidal quality factor of BDs, Q_{BD}, would have to be 10^{3.5} and the secondary needs a spin-orbit misalignment greater than 50 degrees. However, tidal synchronization time scales for 2M0535-05 restrict the tidal dissipation function Q_{BD} to values greater than 10^{4.5} and rule out intense tidal heating in 2M0535-05. We provide the first constraint on Q_{BD}. Tidal heating alone is unlikely to be responsible for the surprising temperature reversal within 2M0535-05. But an evolutionary embedment of tidal effects and a coupled treatment with the structural evolution of the BDs is necessary to corroborate or refute this result.Comment: accepted by AandA January 2010, 18 pages, 13 figures, 1 tabl